Magnetic shielding sheet for digitizer and portable terminal having same

Active Publication Date: 2016-04-14
AMOSENSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a magnetic field shielding sheet used in a portable terminal device to reduce interference from magnetic fields and improve the performance of the device's digitizer. The magnetic field shielding sheet consists of a magnetic field shielding sub-sheet that prevents interference from the device's magnesium frame and a main sheet that shields magnetic fields arising from various components of the device. The magnetic permeability of the magnetic field shielding sheet is optimized through a heat treatment process to improve sensitivity of the digitizer and shield electromagnetic fields generated from the device's main body.

Problems solved by technology

However, in the case of using the magnesium frame, the digitizer is influenced by a magnesium material of the magnesium frame, to thereby cause a problem that the digitizer function is reduced.

Method used

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  • Magnetic shielding sheet for digitizer and portable terminal having same
  • Magnetic shielding sheet for digitizer and portable terminal having same
  • Magnetic shielding sheet for digitizer and portable terminal having same

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Embodiment Construction

[0022]The above and other objects, features, and advantages of the present invention can be appreciated by the following description and will be understood more clearly by embodiment of the present invention. In addition, it will be appreciated that the objects and advantages of the present invention will be easily realized by means shown in the appended patent claims, and combinations thereof. Accordingly, the technical spirit of the present invention can be easily implemented by one of ordinary skill in the art.

[0023]Further, if it is determined that the detailed description of the known art related to the present invention makes the gist of the present invention unnecessarily obscure, a detailed description thereof will be omitted.

[0024]FIG. 1 is an exploded perspective view of a portable terminal device according to an embodiment of the present invention.

[0025]Referring to FIG. 1, a portable terminal device according to an embodiment of the present invention includes: a case com...

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Abstract

A magnetic field shielding sheet includes: a magnetic field shielding main sheet disposed on the back of the digitizer to thus prevent affecting the digitizer; and a magnetic field shielding sub-sheet laminated in a dual on at least one of four side edges of the magnetic field shielding main sheet, and to prevent affecting the digitizer by the magnesium frame inside the portable terminal, wherein the magnetic field shielding main sheet includes a shielding layer made of a plurality of pieces, a cover layer adhered to one surface of the shielding layer, and a double-sided tape adhered to the other surface of the shielding layer. A magnetic field arising from various components incorporated in a portable terminal device is shielded by the magnetic field shielding main sheet while the magnetic field shielding sub-sheet prevents a digitizer from being affected by a magnesium frame, thereby enhancing performance of the digitizer.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a magnetic field shielding sheet for a digitizer, which minimizes impact on a geomagnetic sensor, shields a magnetic field arising from various components incorporated in a portable terminal device for implementing a digitizer function in the portable terminal device and improves sensitivity of an electronic stylus, and to a portable terminal device having the same.BACKGROUND OF THE INVENTION[0002]Recently, portable terminals such as smartphones equipped with a digitizer function have released and become popular. A digitizer using an electronic pen can draw a line of about 0.7 mm thick which is more elaborate than a capacitive touch panel which recognizes a line of 3-4 mm thick. Therefore, the digitizer using an electronic pen can easily perform a fine operation.[0003]The digitizer function is also applied to a large-screen tablet personal computer (PC) or the like that employs a large display, as well as a small portable ...

Claims

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Application Information

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IPC IPC(8): H05K9/00G06F1/20G06F1/16H04B1/3888
CPCH05K9/0083H04B1/3888G06F1/1643G06F1/203H05K9/0088G06F1/1656G06F2203/04107G06F3/046H04B1/38H05K9/00H05K9/0086B32B2307/212G06F2203/04108G06F3/041
InventorJANG, KIL JAELEE, DONG HOONKIM, KI CHUL
OwnerAMOSENSE